Now that you're all set up, log in to Temboo and go to the Twilio > SMSMessages > SendSMS Choreo in the Temboo Library. Turn on IoT Mode and make sure that you've added details about the shield that your Arduino board is using to connect to the internet. You can do this by setting IoT Mode to ON in the upper right-hand corner of the window and then selecting Arduino and Adafruit CC3000 WiFi from the dropdown menus that appear, as shown below:
Next, fill out the Input fields using the information from your Twilio account, the text of the SMS that you want to send, and the phone number to which you would like to send it. You'll find your Twilio Account SID and Auth Token by going to Twilio and checking your Dashboard, as shown below; note that you need to use the credentials found on the Dashboard, not the test credentials from the Twilio Dev Tools panel:
When using a free Twilio account, you'll need to verify the phone numbers to which messages are being sent by going to Twilio and following the instructions under the Numbers > Verified Caller IDs tab, as shown below.
Once you've filled out all of the input fields on the Temboo SendSMS Choreo page, test the Choreo from your browser by clicking Run at the bottom of the window.
If you elected to send the SMS to your own phone number, you should receive it (and if you didn't, whomever you chose will instead). You'll also see a JSON that is returned by Twilio appear under Output, indicating that, among other things, your test executed successfully.